Calling device.



A. H. DYSON.

CALLING DEVICE.

APPLICATION FILED FEB. 14, 1912.

2 SHEETS-SHEET I.

I fizz/2222271": Flea. 1 12575021 Patented Jan. 2

mam? A. H. DYSON.

CALLING DEVICE. APPLlCATlON FILED FEB. '14, 1912.

7% fl W T 2n H s an. JT E dM 65 m nu t a P mwm ALFRED H. DYSON, OFCHICAGO, ILLINOIS, ASSIGNOR 1'0 KELLOGG SWITCHBOARD AND SUPPLY COMPANY,OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CALLING DEVICE.

Specification of Letters Patent.

Patented. Jan. 2,1917.

Application filed February 14, 1912. Serial No. 677.499.

ments in Calling Devices, of which the folv lowing is a specification.

My invention has to do with calling devices, or impulse transmitters asthey are also called, in general and particularly to devices of thatcharacter-wherein a setting member is actuated to adjust impulsemechanism, which upon being released will transmit a plurality ofimpulses, or in other words, causes operations of its impulse springscorresponding to the adjustment of the device, an object being toprovide a device of the above character of novel and im-v provedconstruction, and as will be more particularly pointed out in thefollowing specification and claims.

I am familiar with calling devices of the art in which amanually-operated setting member or dial is actuated to'adjustassociated impulse mechanism, whereupon the dial is released restoringto normal followed by the operation of the impulse mechanism. In-devicesof the type referred to, if the dial is not completely actuated but isprematurely released, it restores to normal causing an operation of theimpulse mechanism and an effective operation of the impulse contactsprings. It is apparent that in such a device that the impulse springsare effectively operated regardless of whether the dial is or is notproperly operated.

One of the features of my invention is to provide means whereby, indevices of the character referred to, an effective operation of theimpulse springs is not secured unless the dial is fully operated.

For a more complete understanding. of my invention reference is to behad to the accompanying drawings in which like reference charactersindicate like parts and in which I Figure 1 is a sectional view. of thepreferred construction of the calling device of my invention. Fig. 2 isa rear view of the same device showing the parts at normal. Fig. 3 is aview similar to Fig. 2but showing the parts with the dial in a fullyactuated position .and with the impulse mechanism adjusted and ready torestore. Fig. 4 is a view similar to Fig. 3 but with the dial restoredand the impulse mechanism released and ready to operate responsive toits adjnstment. Fig. 5 isa sectional view along llne 55 of Fig, 1looking in the direction of the arrow mdlcated thereon, and with all theparts illustrated at normal. Fig. 6 is a' view similar to Fig. 5 butwith the finger lever moved to its actuated position. Fig. 7 ls a faceview of the device with a portion of the dial or setting member brokenaway disclosing the finger lever. Fig. 8 is a sectional view of theparts carried by the main shaft, which includes the impulse mechanism A.Fig. 9 is a perspective view of the impulse mechanism and cooperatinglocking pawls. Figs. 10 to 15 inclusive are views of, different detailsof the mechanism and Fig. 16 illustrates diagrammaticallya Wellknownform of substation telephone with the calling device connected therewithin a preferred manner.

Generally speaking to operate the calling device. the operator inserts afinger in the desired finger hold of the dial illustrated: in Fig. 7which is then rotated in a clockwise direction until the finger engagesand moves the finger lever as illustrated in Fig. 7 to its dotted orfully actuated position. This movement of the dial adjusts impulsemechanism A and upon actuation of the finger lever a set of shuntsprings are operated and the impulse mechanism is locked in its adjustedposition so that upon the operator releasing his hold upon the dial,said dial restores to normal thereupon unlocking the impulse mechanismwhich now operates the impulse springs a number of times correspondingto the adjustment of the dial and said impulse mechanism. During therestoration or operation of the impulse mecha: nism, the dial is lockedagainst actuation, but upon the return of the impulse mechanism tonormal the dial is unlocked, allowingiit to be again operated.

eferring now more in detail to the preferred construction of myinvention, it'comprises a rotatable dial or setting niember 1 rigidlyfastened to main shaft-2 y means'of a nut-3. The said shaft 2isjournaled near its front end in a plate 4 and at its rear end in abridge plate 6. A third plate 7 is also provided, these plates 4! and 7.being secured together by fneans of the studs 8, 9, 10, 11 and 12, theplate 6 being then clamped against plate 7 by means of studs 8 and 12,

the said plates and studs thus forming a rigid frame or support for themechanism. In-severalof the views I have shown arrows on the rotatablemembers such as gears,

etc., these arrows indicate the direction of' rectly beneath theopenings 13, and indieating the number of operations of the associatedimpulse springs which will be effected when the finger is inserted inthe corresponding hold and the dial fully actuated.

To restore the dial afterit has been operated, I provide restoringmeans, preferably a spring 14 having one end secured to.

shaft 2 and the other end to plate 7, in such a manner that when thedial is rotated in a clockwise direction and the operators fingerremoved therefrom, or the pressure of the finger removed, saidsprin'g'14 acts upon the dial and shaft to restore it in acounterclockwise direction until the stop pin 15 carried by dial 1 (Fig.7) again engages a stop pin 16 which is rigidly secured to front plate4. Said spring 14 is incased in a spring barrel 17 secured to shaft 2and having gear teeth out in its periphery and adapted to cooperate withthe governor mechanism O' to retard the restoration of the dial.

A control or finger lever 18 is loosely carried by shaft 2, beingnormally held against a stop pin 19, and having a tension spring 20pressin against its lower edge. Thus when the nger is inserted in one ofthe-finger holds 13 and the dial rotated in a clockwise direction thefinger engages finger lever 18 carrying it along until it reaches theposition indicated by the dotted lines in Fig. 7'. A rearwardlyprojecting portion 18 passes through an opening 21 in plate 4 and isadapted to coiiperate with certain parts of the device as will be moreclearly set forth.

Impulse spring operating mechanism A is preferably-supported on mainshaft 2 and comprises a secondary shaft or sleeve 22 rotatably carriedon shaft 2, said sleeve 22 having rigidly secured thereto other parts ofmechanism A includingspring barrel 23 which also has the impulse teeth24 cut on the periphery thereof; a gear wheel 25 and a toothed lockingdisk 26. To operate the mechanism A, or in other Words restore it fromits adjustment, I preferably provide a separate power means in the formof a spring- 27lwhich is mounted in spring barment. A collar or hub 28is rigidly secured to main shaft 2 preventing lateral-imovement ofmechanism A.- This hub 28 carries a firiger'28 which normally engages astud or pin 29. securely driven into stop disk 26. Thus when the dial isrotated ina clockwise direction, due to finger 28 engaging said pin 29,the mechanism A is rotated or adjusted according to the extent ofactuation of dial 1.

A dial locking pawl 30 is provided, being rotatably supported by a shaft31, and normally resting against said pin 29 under. tension of a spring32. A e06 crating stop or notch 33 is provided in sha t 2 being adaptedto be engaged by pawl; 30 to lock the dial (after it has been operated)against furthermovement during the operation of the impulse springs, aswillbe described. A locking pawl 34 for impulse mechanism A rovided,being rotatably supported by shaft 31 and held under tension of saidspring 32 against finger 35, said finger being rigidly supported inblock 36 which in turn isrotatably supported by shaft 31. Thus it willbe seen that the three members 30, 34 and 36 are all supported by shaft31, but are all independently movable.

As previously stated locking pawl 34-1s normally resting against thefinger. 35, and finger 35 being rigidly secured to block 36 is held inits normal position, (as indicated in Fig. 2) due to the projecting pin23' carried by spring barrel 23, engaging the arm 36 carried by block36. Thus when the dlal is operated carrying mechanism A around with it,pin 23 moves away from arm 36, but due to the extension 18 of fingerlever 18 ,engaging block 36, (Figs..-1,'2 and 5) block 36 is not free torotate until the finger lever has been moved to its actuated osition,thus causing extension 18 to free itself of block 36 as indicated inFigs. 3, 4 and 6 whereby block 36 is adapted to be rotated, preferablyby the tension of spring .39. Pawl 34 is also normally engaged by thefinger 28, the said finger 28 engaging the lateral extension 34 asindicated more clearly in Figs. 1, 2 and 4, so that normally pawl 34 isheld by members 28 and 36 or depending upon their relative adjustment byeither of the members 28, 36. Of course when the dial is operated,finger 28 moves away from pawl 34, but due to pawl 34 being engaged bythe wire finger 35 it is still held out of engagement with locking disk26 until the finger lever is actuated, whereupon pawl 34 is moved intolocking engagement with a tooth of disk 26, thus locking mechanism Auntil the dial is restored which is upon removal of the fingertherefrom. Upon the dial reaching normal finger 28' again engagesextension 34 of pawl 34 hiting it free of locking disk 26 to allow theoperation of mechanism A.

A set of contact springs D are provided comprising three contact springs38, 39, 40 which are insulatingly mounted upon plate 4. Middle spring 39normally rests under tension against the lower end of block 36 in such amanner that when the dial has been operated and finger lever '18actuated, said spring 39 is free to act upon block 36 moving it into itsactuated position as Indicated in Figs. 3, 4 and 6.

It will be apparent that contact springs D are not operated unless thedial is fully actuated allowing actuation of finger lever 18 wherebyblock 36 is unlocked to allow its actuation and the actuation of contactsprings D.

The impulse contact arrangement I preferably employ is shown at Bcomprising a pair of normally closed contacts 41, 42 whichareinsulatingly mounted upon a bracket 43 which in turn is secured to frameplate 7. To operate springs 41, 42 I preferably employ an arm 44 pivotedat 45 and carrying a pivoted triangular member 46 supporting a roller 47which rests against impulse wheel 24 under tension of spring 48. Arubber buffer 49 is carried by spring 41 and passes through holes inspring 42 and bracket 43, and is adapted to be engaged by arm 44 whensaid arm is reciprocated by cooperation of the impulse wheel 24 and theroller 47. The pivoted member 46 is so arranged that when the dial isactuated, that is moved in-a clockwise direction thus carrying impulsewheel 24 around in the direction of the arrow indicated thereon, theteeth of wheel 24 tend to swing roller 47 toward the left (Figs. 2, 3,4) without reciprocating the arm 44. But when mechanism A is releasedand impulse wheel 24 restored from its adjustment, the teeth of wheel 24act upon roller 47 and member 46 in such a manner that arm 44 isreciprocated thereby operating contact springs 41-42.

To control the rate of operation of the im pulse springs, governormechanism C is provided, this governor mechanism also being adapted toretard the restoration of the dial when released after being actuated.For this purpose I provide the well known escapement mechanismcomprising a weighted I pallet 50 supported by a shaft 51'and adapted tocoiiperate with the escapementwheel Said wheel 52 is rigidly secured toa shaft 53' having pinions 54, 55 rigidly secured thereto. Intermediateor connecting gearing is provided for operatively associating the dialwith the governor, this gearupon shaft 67 an ing comprising a (gear 56loosely supported in mesh with p1n1on 54. A ratchet wheel 57 and pinion58 are rigidly fastened to ether and free to rotate upon said shaft 6 Apawl 59 is carried by gear 56 and pressed into engagement with the teethof .ratchet wheel 58 by means of a spring 60. Pinion 58 being inengagement with the gear 17 (which it will be remembered is rigidlysecured to the mam shaft 2) .when the dial 1 is rotated in a clockwisedirection, pinion 58 moves in the direction of the arrow indicatedthereon (Fig. 5) causing the teeth of ratchet wheel 57 to pass pawl 59without rotating the large gear 56. With this arrangement 1t will beseen that when the dial is actuated it is free of the retarding efl'ectgovernor mechanism C, but

governor mechanism' C, but upon restorat1on of mechanlsm A its movementis retarded by said governor C.

At Fi 16 I have illustrated a well known form 0 substation telephonehaving the calling device of my invention connected in circuit therewithina preferred arrangement. The impulse springs 41-42 are connected inseries with the line conductors 65, 66, but said springs 41-42 haveshunt springs 39-40 so connected that a closed circuit is normallyconnected across said springs 41-42, sothat to secure an effectiveoperation of impulse springs 41-42 it is necessary to first interruptshunt contacts 39-40. I also provide a contact 38 so connected that whencontacts 38-39 are closed the substation apparatus is shunted thereby,thus reducing the line resistance and also preventing interferencewith'the transmission of the impulses by the operation of the switchhookcontacts.

Operation: Having described the detailed construction of a preferredarrangement of my invention, its operation will now be described. Wewill assume that the device is connected in circuit to a substation asillustrated in Fig. 16 and that the operator desires to effect fiveoperations of impulse springs 41-42. Therefore the operator inserts afinger in the hole opposite the indicating numeral 5 and the dial 1rotated in a clockwise direction. As the dial leaves normal, due to theengagement between finger 28- andpin 29, mechanism A is of course'carried around and adjusted according to allowing spring. 32 to actupon pawl 30 whereby it'engages shaft 2 as illustrated in seen that thistravel of the dial has advanced Fig. 3. During the adjusting movement ofmechanism A, the impulse teeth of wheel 24 cooperate with roller 47 andpivoted member 46 in such a manner that member 46 is simply vibrated onits pivot without reciprocating arm 44. Now as the dial 1s continued inits advancement, the finger engages finger lever 18 and the continuedmovement thereof brings lever 18 into its actuated position which isindicated by dotted lines in Figs. 4, 6 and 7-. It will be mechanism Afive operating positions, or in other words advanced five teeth ofimpulse wheel 24 and five teeth of locking disk 26. The said operationof finger lever 18 causes its extension 18' to move downward trippingblock 36 whereupon the tension of spring 39 rotates the block 36. aboutits pivot and into its operated position as illustrated in Figs. 3,- 4and 6. This releasing operation of block 36 of course allows shuntsprings 39, 40 to open and interrupt the shunt circuit about contactsprings 41-42, and due to the closing of contact springs 38, 39 a shuntis closed around the substa tion apparatus. Although when the dial movedoff normal, finger 28' moved away from the lateral extension 34 oflocking pawl 34, said pawl 34 was prevented from moving ofi normal dueto its engagement with the wire finger 35 carried by block 36, so thatas block 36 is tripped by the actuation of finger lever 18 this finger35 tends to move away from pawl 34 whereby 34 moves inte lockingengagement with a tooth of wheel 26 as illustrated in Fig. 3. When dial1 is operated gears 17 and 25 are rotatedthereby, but due to the ratchetand pawl arrangements in the gearing connecting these gears with thegovernor mechanism C, dial 1 advances without being retarded bymechanism C. The locking pawl 34 having dropped into locking engagementwith looking disk 26 as stated, 1t is apparent that further advancementof the dial is prevented, therefore upon the operator reheving thepressure of the finger upon dial 1 it is free to be restored by spring14 which acts upon shaft 2, restoring it until stop pin 15 carried bydial 1 engages stop pin 16. During this restoring movement of dial 1,due to the connections extending from gear 17 to the governor mechanismO,this intermediate connection comprising the gears 58, 56 and ratchet57, the restoration of dial 1 is retarded. It is apparent that thisconnection extending between the dial and governor mechanism preventsthe dial from snapping back with the usual attendant jar to theassociated mechanism. Upon the dial reaching normal, dial locking pawl30 sna s into the tooth 33 of shaft 2 as illustrated in Fig. 4, lockingthe dial and preventin its actuation unt1l pawl 30 is released. hisrelease of pawl 30 is not efiected until the again referred to. Upon thedial reaching normal as just referred to, finger 28 engages the lateralprojection 34' of locking pawl 34, lifting said pawl out of lockingengagement with the impulse mechanism which is now free to operateaccording'to its adjustment. Locking pawl 34 having freed mechanism A,the power spring 27 acts upon said mechanism to restore it, therebycausing the five impulse-teeth of wheel 24 which were previouslyadvanced, to act upon roller 47 and reciprocating arm 44 five times,causing five operations of impulse springs 4142. As mechanism A movestoward normal, the pin 23 carried thereby engages the extension 36 ofblock 36 rotating said block on its pivot thereby restoring shunt spring39 to normal and also allowing finger lever 18' to be restored by theaction of its spring 20. Also due tothis restoring movement of block 36its wire finger 35 again moves up into engagement with looking pawl 34.Also upon restoration of impulse mechanism A, the pin 29 carried by thelocking disk 26, engages and lifts dial locking pawl 30 out ofengagement with the notch '33 in shaft 2, said pin 29 also engagingfinger 28' and mechanism A is brought to a stop.

As previously stated, the restoring movement of mechanism A is retardedby the governor mechanism C due to the connection extending from itsgear 25, and gears 61,63 to the gear 55 of mechanism C, thus theoperations of the impulse contacts are effected at a predeterminedperiod.

Should an operator fail to fully actuate dial 1, that is fail to advanceit far enough to allow the finger to actuate lever 18, and then releasethe hold upon, the dial, it will be restored to normal. But as theoperator failed to actuate the finger lever it will be seen that themechanism A was not locked in an adjusted position so. that when thedial restores the mechanism A restores with it and although such arestoration of mechanism A will actuate impulse springs 4142, due to thefailure to operate shunt spring 39, such an operation of the impulsesprings is not an effective operation as the shunt around the impulsecontacts is maintained closed through contacts 3940.

impulse mechanism has operated as will be calling device it is essentialthat the dial be fully operated and the finger lever 18 actuated to tripthe lockin pawl, thereby also causing the operation 0. the shuntsprings.

Although I have shown a preferred arrangement of the contact springs andworkedv out my invention in a specific manner to meet the commercialrequirements of such a device, it is apparent that many changes andmodifications thereof may be made and I do not desire to be limited tothe exact structure as disclosed, but aim to cover all such devices ascome within the spirit and scope of the appended claims.

What I desire to secureas new by United States Letters Patent is:

1. A calling device comprising impulse mechanism and means for theadjustment thereof, impulse contacts operated responsive to said impulsemechanism, shunt contacts normally connected in shunt.of said impulsecontacts, and means for interrupting said shunt contacts responsive to asetting operation of said-impulse mechanism.

2. A calling device comprising a 'setting member having a fully operatedposition,

impulse mechanism adjusted for operation responsive to actuatlon of saidmember to such position, means for restor ng said member, means actuatedupon restoration of said 7 member whereby said mechanism is subsequentlyoperated, shunt contacts, and mechanism responsive only to a fullsetting operation for operating said contacts and maintaining themoperated while said impulse mechanism is operating.

3. A calling device comprising an adjustable setting member, impulsemechanism adjusted for operation responsive to adjustment of saidsetting member, shunt contacts normally rendering said mechanisminefi'ective but operated responsive to said setting operation to rendersaid mechanism effective, means for restoring said-setting member, meansactuated upon restoration of said member whereby said mechanism issubsequently operated, and restoring means for said shunt contactsefiective upon operation of said impulse mechanism. 7 4. A callingdevice comprising an adjustable setting member, a finger hold foractuating said member, impulse mechanism adjusted for operationresponsive to adjustment of said setting member, shunt contacts, meansactuated by engagement with the finger while in the finger hold butindependent of the finger-hold to operate said shunt contacts, means forrestoring said setting member, means actuated upon restoration of said.setting member whereby said mechanism is subsequently operated, andrestoring means for said shunt contacts effective upon operation of saidimpulse mechanism.

5. A calling device comprising a setting member, a series of fingerholds for actuating said member, impulse mechanism adjusted foroperation corresponding to actuation of said setting member, means forrestoring said member, means actuated upon restoration of said memberwhereby said mechanism is subsequently operated according to itsadjustment, shunt contacts normally rendering the impulse mechanismineffective, and mechanism for operating said contacts and maintainingthem operated to render the impulse mechanism efii'ective whileoperating.

6. A calling device comprising a setting member having a plurality ofadjacent finger holds, mechanism adjusted responsive to movement of saidmember for transmitting impulses, means for restoring said member andthereafter operating said mechanism for transmitting impulsescorresponding to the selected finger hold, shunt contacts normallyrendering the impulse mechanism inefiective,

and mechanism for operating said contacts and maintaining them operatedto render said impulse mechanism efl'ective fortransmitting theimpulsesl 7. A calling device comprising a setting member having aplurality of adjacent finger holds, mechanism adjusted responsive tomovement of said member for transmitting impulses, shunt contactsnormally rendering the mechanism inoperative, means for operating saidcontacts responsive to the setting movement of said member for renderingthe mechanism eifective, means for restoring.

said member and thereafter operating-said mechanism for transmittingimpulses correspondlng to the selected finger hold, and means forrestoring said shunt contacts after said impulse mechanism has operatedfor transmitting impulses.

8. A calling'device comprising a setting member, a plurality of adjacentfinger holds for actuating said member, impulse mechanlsm ad usted foroperation responsive to actuation of sa d member, a finger lever adaptedto be engaged and operated by the finger when in a selected finger hold,said mechanism being adapted to be locked in its Y adjusted position, apair of normally closed shunt contacts controlled by said finger lever,means responsive to said actuation of the finger lever for efiecting thelocking operation of the impulse mechanism and the interruption of saidshunt contacts, means for restoring said setting member, a deviceresponsive to said restoration of the setting member to release saidimpulse mechanism for operation, and restoring means for said shuntcontacts effective upon operation of said impulse mechanism.

9. A calling device comprising a setting member having a fully actuatedposition,

impulse mechanism adjusted responsive to an ad usting movement of saidsetting member, means for restoring said setting member and therebyoperating said impulse no 86 shunt of said impulse contacts, and means'whereby said impulse contacts are operated,

and means to prevent an effective operation of said impulse contactsunless said setting member, when actuated, has been moved to its fullyactuated position.

11. A calling device comprising a finger hold dial having a fullyactuated position, impulse mechanism adjusted responsive to movement ofsaid dial, means for restoring said dial and thereby operating saidimpulse mechanism from its adjustment, a finger lever adapted to beactuated only upon a full actuation of the dial, and means to prevent aneffective operation of said impulse mechanism unless said setting memberis moved to its fully actuated position and said finger lever operated.

12. A subscribers substation comprising a transmitter and impulsetransmitting mechanism, means for adjusting said impulse transmittingmechanism, impulse contacts operated responsive to said impulsemechanism, shunt contacts normally connected in for interrupting saidshunt contacts and placing a shunt across said transmitter responsiveto-a setting operation of said impulse mechanism.

13. A subscribers substation comprising a microphone and impulsemechanism, means for adjusting said mechanism, impulse springscontrolled bysaid impulse mechanism, shunt springs normally connected inshunt of said impulse springs, means for removing said shunt from aboutsaid impulse springs and placing a shunt about said microphoneresponsive to a setting operation of said impulse mechanism.

14. A calling device comprising a setting member, impulse mechanismadjusted for operation responsive to an actuation of said member, meansfor locking said impulse mechanism in an a'd uSted position, restor mgmeans for said member, means actuated upon restoration of said memberfor unlocking said impulse mechamsm and for.

locln'ng said setting member, means responsive to the restoration of thesaid impulse mechanism for unlocking said setting member, a finger leveractuated upon a full actuation of the setting member, and means forpreventing an effective operation of said impulse member unless saidsetting member is moved to its fully actuated positlon and said fingerlever operated.

Si ed by meat Chicago, county of Cook, and tate of Illinois, in thepresence of two Witnesses.

ALFRED H. DYSON. Witnesses:

GEORGE E. MUELLER, CARRIE E. ANnnBsoN.

